View Compilation Error

0_0_25972938_6292.cpp: In function 'int main()':
0_0_25972938_6292.cpp:14:37: error: 'cout' was not declared in this scope
             if(a+b>c&&b+c>a&&c+a>b) cout << "YES" << endl;
                                     ^
0_0_25972938_6292.cpp:14:54: error: 'endl' was not declared in this scope
             if(a+b>c&&b+c>a&&c+a>b) cout << "YES" << endl;
                                                      ^
0_0_25972938_6292.cpp:15:18: error: 'cout' was not declared in this scope
             else cout << "NO" << endl;
                  ^
0_0_25972938_6292.cpp:15:34: error: 'endl' was not declared in this scope
             else cout << "NO" << endl;
                                  ^